The nodes with less than 4 digits appear smaller. I'd like to have them all of the same size and I can't seem to understand enough of the documentation to get it right. Feel free to suggest me a better way to do this. I'd love to be able to define a function $f(x) = x^2 + 8 \mod 3127$ with $x_0 = 2$ which is where these numbers come from.